Detect CVE-2025-62215 Microsoft Windows Race Condition Exploitation in Google Chronicle
Detects exploitation attempts of CVE-2025-62215, a race condition vulnerability (CWE-362) in Microsoft Windows. This KEV-listed vulnerability can be abused by attackers to gain elevated privileges or execute arbitrary code by winning a time-of-check to time-of-use (TOCTOU) race condition. Detection focuses on suspicious process creation patterns, handle manipulation, and abnormal thread timing indicative of race condition exploitation.
MITRE ATT&CK
- Tactic
- Privilege Escalation Execution
YARA-L Detection Query
rule cve_2025_62215_windows_race_condition {
meta:
author = "df00tech Detection Engineering"
description = "Detects race condition exploitation attempts targeting CVE-2025-62215 in Microsoft Windows"
severity = "HIGH"
priority = "HIGH"
yara_version = "YL2.0"
rule_version = "1.0"
reference = "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-62215"
cve = "CVE-2025-62215"
events:
$event1.metadata.event_type = "PROCESS_LAUNCH"
$event1.principal.hostname = $hostname
$event1.principal.user.userid = $user
$event1.target.process.file.full_path = /(?i)(svchost|lsass|winlogon|services)\.exe$/
$event2.metadata.event_type = "USER_RESOURCE_ACCESS"
$event2.principal.hostname = $hostname
$event2.principal.user.userid = $user
$event2.security_result.category = "SOFTWARE_SUSPICIOUS"
$event3.metadata.event_type = "USER_PRIVILEGE_ESCALATION"
$event3.principal.hostname = $hostname
$event3.principal.user.userid = $user
match:
$hostname, $user over 30s
condition:
$event1 and $event2 and $event3
}Chronicle YARA-L rule detecting a sequence of process launch, suspicious resource access, and privilege escalation events on the same host and user within 30 seconds — consistent with CVE-2025-62215 race condition exploitation.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate privilege escalation by administrators using RunAs or UAC prompts in rapid succession
- Security tools that intentionally trigger multiple UDM event types during scans
- Software deployment pipelines that perform process launches followed by resource access and elevation
- Windows system processes performing self-updates that transiently escalate privileges
Other platforms for CVE-2025-62215
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Simulate Rapid Handle Acquisition on System Process
Expected signal: Windows Security Event Log entries for EventID 4656 (A handle to an object was requested) and 4658 (The handle to an object was closed) appearing in rapid succession for the svchost process, triggering the burst detection threshold.
- Test 2Privilege Escalation Sequence Simulation
Expected signal: EventID 4688 (process creation) followed by EventID 4672 (special privileges assigned to new logon) within seconds, generating the correlated alert pattern.
- Test 3CreateRemoteThread into System Process (Lab Only)
Expected signal: CrowdStrike CreateRemoteThreadV2 event and Windows EventID 4656 for the target process handle, followed by potential Microsoft Defender ATP alert for suspicious cross-process thread creation.
Unlock Pro Content
Get the full detection package for CVE-2025-62215 including response playbook, investigation guide, and atomic red team tests.